Answer: all i know about alkaline metals is he alkaline earth metals are shiny, silvery-white, and somewhat reactive metals at standard temperature and pressure.
All the alkaline earth metals readily lose their two outermost electrons to form cations with a 2+ charge.
All of the alkaline earth metals except magnesium and strontium have at least one naturally occurring radioisotope.
Magnesium and calcium are ubiquitous and essential to all known living organisms.
Explanation:
Answer:
0.6410g of HgS (mercury (II) sulfide) are formed
Explanation:
First you should write the balanced chemical equation, so we have:
Where:
is the formula for the sodium sulfide
is the formula for the mercury (II) nitrate
is the formula for the mercury (II) sulfide
and
is the formula for the sodium nitrate
Then you should calculate the amount of each substance in each solution, so:
- For the :
moles of
- For the :
moles of
As the quantity of is smaller than the quantity of . The is the limiting reagent and you should work with this quantity, so we have:
moles of HgS
And as the molar mass of the HgS is 
you can calculate the mass of HgS that is produced:
HgS
Answer:
Beryllium-8 (8Be, Be-8) is a radionuclide with 4 neutrons and 4 protons. It is an unbound resonance and nominally an isotope of beryllium. It decays into two alpha particles with a half-life on the order of 10−16 seconds; this has important ramifications in stellar nucleosynthesis as it creates a bottleneck in the creation of heavier chemical elements. The properties of 8Be have also led to speculation on the fine tuning of the Universe, and theoretical investigations on cosmological evolution had 8Be been stable.
Explanation:
In areas where resistance is present, otherantimalarials<span>, such as </span>mefloquine<span> or atovaquone, may be used instead. The Centers for Disease Control and Prevention recommend against treatment of malaria with chloroquine alone due to more effective combinations.</span>
Answer:
P total = P1 +P2
Explanation:
765 mm Hg = 18 mm Hg water + ? mm Hg nitrogen
747 mm Hg nitrogen
